Automatic transformer cut-out.



No. 830,209. PATENTED SEPT. 4, 1906. DE WITT 0; GONKLING & J. E. WINN.

AUTOMATIC TRANSFORMBR CUT-00T.

APPLIUATION FILED Nov. 1.4, 1904. nlmnwnn FEB. 17, 190s.

' a SHEETS-slum 1.

aa-Md No. 830,209. PATENTED SEPT. 4, 1906.

DE WITT G. CONKLING da J. E. WINN.

AUTOMATIC TRANSFORMER GUT-OUT.-

APPLIOATION lFILED Nov. 14, 1904. BENEWED PEB. 17. 1906.

l s SHEETS-SHEET 2.

No- 830,209. PATENTED SEPT. 4, 1906. DE WITT C. CONKLING & J. B. WINN.

AUTOMATIC TRANSFORMER OUT-OUT.

APPLICATION FILED Nov. 14, 1,904. BIINBWED mm1?, 1906.

s SHEETS-SHEET s.

uNrrnnY singles;ifriaNfrI OFFICE. DE wrrr o. CONKLING, OF HOBOKEN, AND JOHN E. WiNN, or WEE- HAWKEN, NEW JERSEY, ASSIGNORS TO ELECTRIC ECONOMIES. COMPANY, A CORPORATION OF SOUTH DAKOTA. Y

AUTOMATIC TnANsFoFumEn.cur-OUT'.

Speciication of Letters Patent.

Patented sept. 4, 190e.

Application filed November 14, 1904. Renewed February 17, 1908. Serial No. 301,684. 1 -I To (1J/Z whom it may concern,.-

Be if. known that we, DE wm OQOONK- l' LING, a resident of Hoboken, and JOHN E.

WrNN, a resident of Weehawken, in the county of Hudson, State of New Jersey, citizens of the United States of America, have invented certain new and useful Improvements in an Automatic Transformer Cutby the respective action of turning on and oli' the electric lamps or other translating devices in a system of electrical distribution where an alternating-current generator sup? plies a main line, and said. transformers convert the electromotive force to a higher or lower voltage, the object being to save core loss in the transformers when no translating devices are closed-on secondary. Y

By our invention we accomplish the cutf ting out of the transformer-coils by the action of the alternating current itself. Heretofore cutting out has been obtained by a s ring, gravity, or some force other than the a teinating current, thereby making the system by the old method undesirable for electric-light plants, for when the main line breaks down the lights are not automatically operated again las soon as the line is repaired. By our system in such accidents as soon as a current passes over the mainline again the lamps are instantly and automat-` ically relighted. y Our inventionalso includes the apparatus for securingthese results without regard to the scope of the invention, which is attended to inthe claims. The general conception underlying the organization com rises analternator, a transformer, an e ectrom'agnetic cut-out for the coils thereof and operated by the current of the secondary coil, and a controller for the cut-out for maintaining the cut-out circuit broken as long as a transsecondary coil.

` Figure l is a diagram of one form of system. Fig. 2 is a diagram of another form of system. The circuits may be traced to and through all the a paratus. Fig. 3 is a front elevation of the e ectromagnetic devices for switching lating device is in a closed circuit with said in and out the coils of thel transformer. Fig. 4 1s a side elevation of the same devices with one'of the front parts removed by a section through a line A A. Fig. '5 is a front elevation of the relay. Fig. 6 is a side elevation Vof the same relay mounted. upon 1a plate. Fig: 7 is afront elevation of an electromagnetic circuit-closer for holding the 'transformer cut.- out device in a required hase.' F1g. 8 is a top view of that vshown in ig. 7, mounted upon a plate.

The main difference betweenthe systems in Figs. l and 2 consists in the use of Vthe pilot-transformer A1 in place of the battery 2 in Fig. 1 which latter may consist of only enough cells to give four ormore volts, the battery representing, for example, seven Daniell"s ce ls. The function of; this battery is to furnish a small current for starting the apparatus that switchesV in a transformer 3.

As the currentfrom the battery2 must pass through the'high resistance V.of an incandescent electric lamp, in those cases where such lamps are the translating devices the cur-l rent is too weak to operate an -ordinary phot-transformertothe various substations. A

We will now explain the construction and then the operation of the organization for `switching in the primary and secondary coils pli the transformer 3 in the system shown in i0'. 1. silenoid, so calledbecause it permits a transformer-switch to close the primary and secondary circuits ofthe transformer-coils by the action of a s ring. The mechanism involved consistso the core 5, belonging to the solenoid 4 and having two pins 6 and 7 projecting therefrom to serve as a kind of fork between whose tines extends one arm 8 of a 7 catch, whose other arm 9 normally holds up a rod 10 by pressing upon the lower surface 4 represents a releasing or tripping IOC of a collar 11,fixed upon the rodlO, which is a core of a cut-out solenoid 12, so called because when energized it cuts out the transformercoils of the transformer 3. The catch is pivoted at the pivot 13 to a bent plate 14, whose construction is not essential to an understanding of the invention further than to say this bearing-plate is supported by means of a screw 15 to the laminated external core 16, which is common to the solenoids 4 and 12.

17 is a weight for balancing the arms 8 and 9 as desirednnamely, so thatl the arm 8 is definitely heavier than the arm 9. Normally the pin 6 rests upon the upper surface of the horizontal ortion of the arm 8, which is bent downwar at a oint as measured beyond the point 6 from t e pivot 13. The pin 7 is so located as not to strike the arm 8 until the core has .traveled upward through a greater portion of its stroke for striking the arm 8 with a hammer effect or blow. By normally, as used herein, I mean the condition of the system when all the incandescent electric lamps 18 are excluded from an electric circuit. The arm has at its lower end an extension 19 of reduced diameter forming a shoulder 2() and terminated by a head 21 and passing through a hole in a switch-arm 22. There is a spring 23 surrounding the extension 19 and extending from the head 21 to the arm 22, and with the coils sufficiently aiart to be compressed and jammed together W -en the rod 10 rises. This arm 22 is rigidly connected mechanically to the switch 24'for closing and opening the primary coil 25 of` the transformer 3 and to the switch 26 for o ening and closing the secondary coil 27 of t e transformer 3 and to the switch 28 for opening and closing the circuit of the solenoid 4. The switches 24 and 26 are connected rigidly by and attached to an insulator 29 by screws 30, so that when the arm 22 is moved up and down the switches 24, 26, and 28 are operated. There is a spring 31 normally under compression and tending to throw down the collar 11, together with the rod 10. The arm 9 of the catch prevents this downward movement when the nose 9 of the catch is under the collar 11.

Referring to Fig. 1, the operation for switching in the transformer 3 for supplying the lamps 18 is as follows: Only one of the lamps 18 may be thrown into circuit by a circuit-closer 32; but no current from the transformer will pass through the lamp absolutely instantly, although it will be lighted practically simultaneously. The current from the battery 2 may then circulate throu h the solenoid 4, conductor 37", the inclured lamp 18, secondary coil 27, conductor 66, the relaymagnet 33, through conductors 68 and 39 to the other pole ofthe battery 2. This Weak current closes the `i contacts at 34 belonging to the relay, and 65 thereby the current of the battery may pass through the solenoid 4 and contacts 34 without going through the high-resistance lamp 18, the circuit being first through the conductor 35, then through the solenoid 4, then through the conductor 36, then through the circuit-closer 37, then through the conductor 38, the contacts 34, t 1e conductor 39 to the pole of the battery 2. This battery-current energizes the solenoid 4, which lifts its core 5, whose pin '7 lifts the arm 8 by a sharp blow thereon and removes the nose 9 from under the collar 11, thereby releasingthe rod 10, which is driven down so that the shoulder ushes down the arm 22 and closes the switclies 24 and 26, thereby including, respectively, the primary and secondary coils and 27, the former with the main line 40 and the latter with the lampconductors 41 and a solenoid 42, which is for' the urpose of holding open at the contacts 43 t e cut-out solenoid 12 during the whole time that one or more of the lamps are in circuit with the secondary coil 27. Now the lamps 18 may be utilized, one or more at a time.

When the last lamp is/turned off, the transformer 3 is automatically excluded from the circuit of the lamps of the main line in the following manner: When the last lam is eX- eluded, the circuit of the solenoi 42 is broken, and therefore the spring 44 lifts the core 45 of the solenoid 42 and closes the contacts 43, thereby including the coil 12 in circuit with the secondary coil 27, with the re- IOO sult of the lifting of the rod 10 quickly above the nose 9 and the opening of the switches 24 and 26 and the closing of the switch 28 by the rising of the arm 22. The detail action is as follows: When the rod 10 rises, the spring 23 is compressed until its coils are jammed against one another, causing the force which lifts the arm 22 sufficiently to withdraw the switches 24 and 26 from the s ring-pressed terminals 24 and 26', where tliere is necessarily friction to be overcome. As soon as this release takes place, the recoil of the spring 23 lifts the arm 22 further, and thus ap lies the switch 28 to the terminals 28 for c osing at that point the circuit of the solenoid 4 for subsequent use upon again lighting up the lamps.

A detailed construction of the controller for the cut-out solenoid 12 is shown in Figs. 7 and 8 and is so called because it controls the current' of the solenoid 12 by maintaining the circuit thereof open at the contacts 43 while the lamps 18 are lighted and for closing the circuit at the same contacts as soon as all the lamps 18 are cut off.

The solenoid 42 has an external laminated core 47 connecting the oles of the solenoid, by which construction t e device is more efliother arm by the lowermagnet 33, whichl cient for the purpose. Dne of the contacts 43 is abar 48, fastened to the core 47 by screws 49, and the'other contact 1s on'the spring 44, which is fastened by a screw 50 upon the core 47. An adjusting screw and nut at 51 serve to regulate the pressure be'- magnets have the yokel 59.` 60 is a bracket carrying a spring 61, which bears at its outer end downward upon an extension 62 frornaJ spring 63, that extends irom the armature 57. The spring 61 is therefore a retractile for the armature 57, nal in the path of the terminal 63. The wire 39 leads to one pole of the relay, and the wire 66 leads to the other'pole. The two magnets 33 are connected by a Wire 67, and the contact 64 is connected to the upper magnet 33 l by thewire 68.

In Fig. 2 about the same explanation would apply'as given to Fig. 1, except that the pilot-transformer is used instead of the battery 2. Several stations-.Mould be controlled by only one pilot-transformer. The iigure shows two stations as an example of several. The secondary coil 70 is electrically connected to the solenoids 4 in such a manner that when -a lamp 18 is turned on a current energizes one of the solenoids 4. This action throws in the transformers 3 in 2, the difference being mainly that' no relay is necessary, for the electromotor force in the coil 70 is sufliciently high to properly energize the solenoids 4 through the resistance of the lamps 18. As the word magnet is a generic term for any kind of coil, together with its aimatine or core, whetherin the form of a solenoid or not, the term magnetf is employed in the claims to designate any feature shown in the drawings consisting of an electric coil and a piece of iron to be attracted to the same.

We claim as our invention- 1.l In a system of electrical.distribution, the combination of an alternator, a transformer, translating devices. in circuit therewith, and means energized by an alternating current from the secondary coil of the transformer for breaking the circuit of said coil upon the cutting out of said translating devices. n

2. In a system of electrical distribution, the combination of an alternator, a trans- 64 is a contact-termi-` former,J translating devices in circuit therewith, means energized by an alternating current from the secondary coil of the transformer for breaking the circuit of said coil upon the cutting out of said translating devices, and a controller for said means for breakin the circuit thereof upon including one of t e translating devices in circuit with said coil.

3. In a system of.electrical distribution, the combination of an alternator, a transformer in circuit therewith, a cut-out magnet for switching out the transformer, and adapted to be energized by the alternating current from the transformer, a local generator 2j and a solenoid 4,' adapted to be energized by said generator, for s witchin in the primary and secondary coils of sai transformer.

A 4. In a' system of electrical distribution, the combinationof an alternator, a transformer, translating devices in-circuit therewith, means energized by an alternating current from the secondary coilof the transformer for breaking the circuit of Said coil upon the cutting out of said translating devices, said means consisting of a solenoid, a

core therefor, and snap cut-out switches for the primary and secondary coils of said transformer, and governed by said core.

5. In a system of electrical distribution, the combination of an alternator, a transformer, translating devices in circuit therewith, means energized by an alternating current from the secondary coil of the transformer for breaking the circuit4 of saidcoil upon the cutting out of said translating devices, saidmeans consisting of a solenoid, a

IOO

core therefor, snap cut-out switches for the primary and secondary coils of said transformer, and governed by said core, said switch having an extension provided with a hole, a reduced portion of said core extending through said hole and so disposed that the extension bears upward against a shoulder on said core, a head to the reduced portion beyond the extension as measured from said shoulder, a coil-spring surrounding said reduced portion, and reaching from said head to said extension, said spring being adapted to have its convolutions jammed against one another at the same instant that the cut-out opens, the spring recoiling at the next instant to rapidly separate the cut-out terminals beyond the sparking distance.

' 6. In a system of electrical distribution, the combination of an alternator, a transformer, translating devices in circuit therewith, means energized by an alternating current from the secondary coil of the transformer for breaking the circuit of said coil upon the cutting out of said translating devices, said means consisting of a solenoid, a core therefor, snap cut-out switches for the I IO primary and secondary coils of said transconnected to the opposite poles of the sec- 1o former, and governed by said core, 9, collar on ondary coil of said transformer'.

the core, a catch for holding the collar and Signed this 5th day of November', 1904.

core up to within attractive distance of said DE WITT C. CONKLING. [L. s] solenoid, a spring tendine t0 force said collar below said catch, and anbelectromagnetic de- JOHN E' WINN' [L' S] vice for releasing said catch from said o llar, Witnesses: and actuated by a current obtained by clos- JOHN B. MONAHAN,

ing a translating device, whose terminals are W. H. CRAWFORD. 

